EP0337454B1 - Spritzgiesssystem mit Düse in Tandem - Google Patents
Spritzgiesssystem mit Düse in Tandem Download PDFInfo
- Publication number
- EP0337454B1 EP0337454B1 EP89106618A EP89106618A EP0337454B1 EP 0337454 B1 EP0337454 B1 EP 0337454B1 EP 89106618 A EP89106618 A EP 89106618A EP 89106618 A EP89106618 A EP 89106618A EP 0337454 B1 EP0337454 B1 EP 0337454B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle
- rearward
- backplate
- melt bore
- injection molding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000001746 injection moulding Methods 0.000 title claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 230000008602 contraction Effects 0.000 claims description 6
- 108091092889 HOTTIP Proteins 0.000 claims description 5
- 239000000155 melt Substances 0.000 abstract description 21
- 238000000034 method Methods 0.000 description 6
- 238000000465 moulding Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/278—Nozzle tips
- B29C2045/2783—Nozzle tips with a non-axial outlet opening of the melt channel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C2045/2796—Axially movable nozzles or nozzle tips
- B29C2045/2798—Axially movable nozzles or nozzle tips for compensating thermal expansion
Definitions
- This invention relates generally to injection molding and more particularly to a hot tip gated, sprue gated or edge gated injection molding system comprising at least one nozzle to transfer pressurized melt into a mold cavity.
- an injection molding system comprising at least one nozzle for injecting pressurized melt into a mold cavity, a forward first elongate heated nozzle adjacent to a gate leading to the cavity and rearward second elongate heated nozzle mounted aligned in tandem with said first forward nozzle and a seat structure in between both nozzles providing for sufficient relative axial movement therebetween to provide for thermal expansion or contraction of the rearward nozzle wherein a continuous straight melt passage extends from the rearwards second nozzle to the forward first nozzle.
- a hot tip gated injection molding system comprising; a forward first elongate heated nozzle seated in a well in a forward mold core with a rear end and a forward end adjacent a gate extending from the well to a cavity, the first nozzle having a melt bore extending from an inlet at the rear end to a space surrounding the forward end leading to the gate, a backplate with a rear face having a seat therein concentrically aligned with a melt bore extending through the backplate, the backplate being mounted on the rear end of the first nozzle with the bore extending in axial alignment with the inlet to the first nozzle, the backplate having a portion which extends rearwardly into bearing contact with an upper mold core to hold the backplate and the first nozzle securely in place, a rearward second elongated heated nozzle which is substantially longer than the first nozzle seated in a well in a rearward mold core with a rear end, a forward end, and a central melt bore
- Figure 1 is a sectional view of a portion of an injection molding system showing two elongated heated nozzles mounted in tandem according to a preferred embodiment of the invention.
- FIG. 1 shows one application of a preferred embodiment of the invention.
- a forward nozzle 10 and a rearward nozzle 12 are mounted in tandem in a forward mold core 14 and a rearward mold core 16 to provide a system to fill a cavity 18 to form a plastic top attached to the surrounding sidewalls 20 of a container.
- the forward and rearward mold cores 14,16 can be replaced by forward and rearward mold plates, but the concept remains the same.
- the forward nozzle 10 is seated in a well 22 in the forward mold core 14, and in this embodiment has a nose portion 24 with a tapered outer surface 26 which leads to a pointed tip 28.
- This nozzle 10 is described in detail in the applicant's Canadian patent 1 261 573. It has a circumferential insulation flange 30 which sits on a circumferential shoulder 32 to locate it in the well 22 with the pointed tip 28 adjacent a gate 34 leading to the cavity 18 with an insulative airspace 36 between it and the surrounding forward mold core 14 which is cooled by cooling water flowing through cooling conduits 38.
- the forward nozzle 10 is also located in the well 22 by a sealing and locating flange 40 which extends circumferentially adjacent the nose portion 24.
- the forward nozzle 10 has a melt bore 44 which extends centrally from an inlet 46 at the rear end 48 of the nozzle 10 to a diagonal portion 50 which connects to the tapered surface 26 of the nose portion 24.
- the forward nozzle 10 is heated by an electric heating element 52 which is integrally brazed in as described in Gellert's Canadian patent application serial number 549, 517 entitled “Method of Manufacture of Injection Molding Nozzle Having Grounded Heating Element Brazed into Pointed Tip” filed October 16, 1987.
- the heating element 52 has a helical portion 54 which extends around the melt bore 44 and a longitudinal portion 56 which extends centrally in the nose portion 24.
- the heating element 52 is suitable for low voltage such as 24 volts and has a single resistance wire which is grounded at the forward end 58 by being brazed in a nickel alloy adjacent an air-hard tool steel insert portion 60 which forms the pointed tip 28.
- the heating element 52 has a rear end 62 which extends radially outward through a collar portion 64 of the nozzle and is connected to a threaded stud 66.
- the larger diameter stud 66 is surrounded by ceramic insulation 68 inside a cylindrical sleeve 70 to form a cold terminal 72, as described in detail in the applicant's Canadian patent application serial number 549,520 filed October 16, 1987 entitled "Method of Manufacture of Injection Molding Nozzle Electrical Terminal.”
- the cold terminal 72 receives a lead from an external power supply from which current flowing through to the ground at the forward end 58 heats the nozzle 10 and particularly the pointed tip 28 to a predetermined temperature.
- the longitudinal portion 56 of the heating element 52 extending through the nose portion 24 can have part with a multiple thickness of additional heat if required, as described in the applicant's Canadian patent application serial number 563,981 filed April 13, 1988 entitled “Injection Molding Nozzle Having Multiple Thickness Heating Element and Method of Manufacture.”
- a steel backplate 74 is located against the rear end 48 of the forward nozzle 10 and has a relatively thin flanged portion 76 which extends outwardly and rearwardly across an insulative air space 78 and bears against the rearward mold core 16.
- the flanged portion 76 of the backplate 74 bearing against the rearward mold core 16 holds the backplate and the forward nozzle 10 in place without extensive heat loss to the mold core.
- the backplate 74 has a central melt bore 80 extending therethrough which is equal in diameter to and axially aligned with the inlet 46 to the melt bore 44 through the forward nozzle 10.
- the backplate 74 also has a cylindrical seat 82 in its rear face 84 which is concentrically aligned with the central melt bore 80.
- the rearward nozzle 12 is similarly seated in a well 86 in the rearward mold core 16 with an insulative air space 88 between them.
- the rearward nozzle 12 is normally several times longer than the forward nozzle 10 and has a central melt bore 90 which is considerably large in diameter than the melt bore 80 through the backplate 74 and the melt bore 44 through the forward nozzle 10.
- the central melt bore 90 extends from an inlet 92 at the rear end 94 to the forward end 96 in axial alignment with the bore 80 through the backplate 74 and the inlet 46 to the melt bore 44 through the forward nozzle 10.
- the bore 90 has a threaded mouth 98 at the forward end 96 which receives a removable gate insert 100.
- the gate insert 100 is similar to those shown in the applicant's Canadian patent application serial numbers 529,897 filed February 17, 1987, and Gellert's Canadian patent application serial number 532,677 filed March 20, 1987 and 549,516 filed October 16, 1987.
- a gate insert having a separate electrical heating element is shown in Gellert's Canadian patent application serial number 559,000 filed February 16, 1988 entitled "Injection Molding Heated Gate Insert and Method”.
- the gate insert 100 is made of steel with an intermediate portion 102 between a threaded cylindrical rear portion 104 and a cylindrical forward portion 106.
- the cylindrical forward portion 106 is made to fit in the cylindrical seat 82 in the rear face 84 of the backplate 74.
- the intermediate portion 102 has a hexagonal surface 108 which can be engaged by a wrench to tighten it into place.
- the gate insert 100 has a central melt bore 110 which extends therethrough in axial alignment between the melt bore 90 of the rearward nozzle 12 and the melt bore 80 through the backplate 74. As can be seen, the melt bore 110 through the gate insert 100 is tapered to smoothly reduce the melt bore diameter from that of the rearward nozzle 12 to that of the forward nozzle 10.
- the rearward nozzle 12 is shown with the removable gate insert 100, it can merely have a cylindrical projecting portion in place of the gate insert 100, similar to that shown in Gellert's U.S. patent number 4,579,520 which issued April 1, 1986.
- a hollow nozzle seal can be used to extend between the forward end 96 of the rearward nozzle 12 and the seat 82 in the rear face 84 of the backplate 74.
- the nozzle seal has a rear portion which is seated in the forward end 96 of the nozzle 12 and a forward nose portion which is received in the seat 82 similar to that shown in Gellert's U.S. patent number 4,286,941 which issued September 1, 1980.
- the rearward nozzle 12 is located in the well 86 in the rearward mold core 16 by an insulation flange 112 seated on a circumferential shoulder 114 in a position wherein the forward end 96 of the gate insert 100 (or equivalent in an alternate arrangement) slides in the seat 82 in the rear face 84 of the backplate 74.
- the rearward nozzle 12 also has an integral electrical heating element 116 and can be made, for instance, by the methods disclosed in Gellert's U.S. patent number 4,403,405 which issued September 13, 1983 or Gellert's Canadian patent application serial number 532,677 filed March 20, 1987 entitled "Injection Molding Nozzle and Method"
- the heating element 116 has a helical portion 118 which extends around the central melt bore 90 and a rear end 120 which extends radially outward to a pair of cold terminals 122 which receives electrical power from external leads (not shown).
- the heating element 116 is of the double resistance wire type and suitable for relatively high voltage such as 115 volts or 240 volts.
- the rearward nozzle 12 is held securely in position by a backplate 124 having an outwardly and rearwardly flanged portion 126 which abuts against a collar 128 which is bolted to the mold.
- the backplate 124 is secured by bolts 130 to the rear end 94 of the rearward nozzle 12 and has a central melt bore 132 which receives pressurized melt from the nozzle 134 of a molding machine and conveys it to the inlet 92 of the rearward nozzle 12.
- Alternate structure can be provided to hold the rearward nozzle 12 in place in the well 86. While a single cavity system has been shown in this embodiment, of course a manifold can be used to distribute the melt in a multi-cavity system as well.
- the alignment of the forward and rearward nozzles 10,12 provides a continuous straight melt passage 138 from the nozzle 134 of the molding machine through the backplate 124, the rearward nozzle 12, the gate insert 100 and the backplate 74 to the forward nozzle 10.
- Pressurized melt is introduced from the molding machine nozzle 134 and flows through the melt passage 138 to the space 42 surrounding the nose portion 24 of the forward nozzle and from there through the gate 34 to fill the cavity 18.
- the diameter of the melt bore 90 of the rearward nozzle 16 is considerably larger in diameter than the melt bore 44 of the forward nozzle 10.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Claims (9)
- Spritzgießsystem mit zumindest einer Düse zum Einspritzen von unter Druck stehender Schmelze in einen Formhohlraum, gekennzeichnet durch eine vordere erste langgestreckte beheizte Düse (10), benachbart zu einem Anschnitt (34), der zu dem Formhohlraum (18) führt, und einer hinteren zweiten langgestreckten beheizten Düse (12), angeordnet in hintereinanderliegender Ausrichtung mit der ersten vorderen Düse (10), und eine Sitzanordnung (74) zwischen beiden Düsen (10, 12), die eine ausreichende relative axiale Bewegung zwischen den Düsen bereitstellt, um thermische Ausdehnung oder Kontraktion der hinteren Düse (12) aufzunehmen, wobei ein kontinuierlicher, gerader Schmelzekanal (138) sich von der hinteren zweiten Düse (12) zu der vorderen ersten Düse (10) erstreckt.
- Spritzgießsystem nach Anspruch 1, gekennzeichnet durch(a) die vordere erste langgestreckte beheizte Düse (10) hat ein hinteres Ende (48) und ein vorderes Ende, eingesetzt in eine Bohrung (22) in einem vorderen Formkern (14), wobei diese erste Düse (10) benachbart zu dem Anschnitt (34) angeordnet ist, der sich von der Bohrung (22) zu dem Formhohlraum (18) erstreckt, wobei die erste Düse (10) eine erste Schmelzebohrung (44) aufweist, die sich von einem Einlaß (46) am hinteren Ende (48) zu einem Raum (42) erstreckt, der das vordere Ende umgibt und zu dem Anschnitt (34) führt,(b) eine Rückplatte (74) mit einer hinteren Fläche (84), in der ein Sitz (82) ausgebildet ist, wobei der Sitz (82) konzentrisch mit einer zweiten Schmelzebohrung (80) ausgerichtet ist, die sich durch die Rückplatte (74) erstreckt, wobei die Rückplatte (74) auf dem hinteren Ende (48) der ersten Düse (10) montiert ist, so daß sich die zweite Schmelzebohrung (80) in axialer Ausrichtung mit dem Einlaß (46) zu der ersten Düse (10) erstreckt, die Rückplatte (74) einen Teil (76) aufweist, der sich nach rückwärts in Lagerkontakt mit einem hinteren Formkern (16) erstreckt, wobei der hintere Formkern (16) die Rückplatte (74) und die erste Düse (10) sicher an Ort und Stelle hält,(c) die hintere zweite langgestreckte beheizte Düse (12) hat ein hinteres Ende (94), ein vorderes Ende (96) und eine zentrale dritte Schmelzebohrung (90), wobei die zweite Düse (12) wesentlich länger ist als die erste Düse (10) und in einer Bohrung (86) in einem hinteren Formkern (16) sitzt, wobei diese zentrale dritte Schmelzebohrung (90) sich durch die zweite Düse (12) zu dem vorderen Ende (96) der zweiten Düse (12) erstreckt, die dritte Schmelzebohrung (90) in axialer Ausrichtung mit der zweiten Schmelzebohrung (80), die sich durch die Rückplatte (74) erstreckt, und dem Einlaß (46), der zu der ersten Schmelzebohrung (44) führt, die sich durch die erste Düse (10) erstreckt, ist, wobei das vordere Ende (96) der hinteren Düse (12) einen nach vorwärts vorspringenden Abschnitt aufweist, der in dem Sitz (82) in der hinteren Fläche (84) der Rückplatte (74) aufgenommen ist, um eine gleitende axiale Bewegung zwischen dem vorderen vorspringenden Abschnitt und dem Sitz (82) zu gestatten, um die thermische Ausdehnung und Kontraktion der hinteren Düse (12) zu berücksichtigen.
- Spritzgießsystem nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die vordere Düse (10) einen Nasenabschnitt (24) an dem vorderen Ende aufweist, wobei ein Teil (58) eines elektrischen Heizelementes (52) integral in den Nasenabschnitt (24) hartverlötet ist.
- Spritzgießsystem nach Anspruch 3, dadurch gekennzeichnet, daß der Nasenabschnitt (24) sich zu einer zulaufenden Spitze (28) erstreckt, die benachbart zu und in mittiger axialer Ausrichtung mit dem Anschnitt (34) vorgesehen ist, um ein Heißspitzenanschnittsystem zu schaffen.
- Spritzgießsystem nach zumindest einem der vorhergehenden Ansprüche 2 bis 4, dadurch gekennzeichnet, daß der nach vorwärts vorspringende Abschnitt des vorderen Endes (96) der hinteren Düse (12) durch einen Anschnitteinsatz (100) gebildet wird, der Anschnitteinsatz (100) einen zylindrischen hinteren Gewindeabschnitt (104) aufweist, der in das vordere Ende (96) der hinteren Düse (12) eingeschraubt ist, einen zylindrischen vorderen Abschnitt (106) aufweist, der in dem Sitz (82) in der hinteren Fläche (84) der Rückplatte (74) aufgenommen ist, und eine zentrale vierte Schmelzebohrung (110) aufweist, die sich durch den Anschnitteinsatz (100) in axialer Ausrichtung zwischen der dritten Schmelzebohrung (110), die durch die hintere Düse (12) verläuft und der zweiten Schmelzebohrung (80), die durch die Rückplatte (74) verläuft, erstreckt.
- Spritzgießsystem nach zumindest einem der vorhergehenden Ansprüche 2 bis 4, dadurch gekennzeichnet, daß der nach vorwärts vorspringende Abschnitt (106) des vorderen Endes (96) der hinteren Düse (12) durch eine Düsendichtung gebildet ist, wobei die Düsendichtung einen hinteren Abschnitt aufweist, der in dem vorderen Ende (96) der hinteren Düse (12) sitzt, einen vorderen Nasenabschnitt aufweist, der in dem Sitz (82) in der hinteren Fläche (84) der Rückplatte (74) aufgenommen ist, und eine zentrale vierte Schmelzebohrung (110) besitzt, die sich durch die Düsendichtung in axialer Ausrichtung zwischen der dritten Schmelzebohrung (90), die sich durch die hintere Düse (12) erstreckt, und der zweiten Schmelzebohrung (80), die durch die Rückplatte (74) verläuft, erstreckt.
- Spritzgießsystem nach zumindest einem der vorhergehenden Ansprüche 2 bis 6, dadurch gekennzeichnet, daß der sich nach hinten erstreckende Abschnitt der Rückplatte (74) ein dünner Flanschabschnitt (76) ist, der sich nach außen und hinten in Lagerkontakt gegen den oberen Formkern (14) erstreckt.
- Spritzgießsystem nach zumindest einem der vorhergehenden Ansprüche 2 bis 7, dadurch gekennzeichnet, daß die dritte Schmelzebohrung (90), die sich durch die hintere Düse (12) erstreckt, im Durchmesser größer ist als die erste Schmelzebohrung (44), die sich durch die vordere Düse (10) erstreckt.
- Spritzgießsystem nach zumindest einem der vorhergehenden Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die hintere Düse (12) ein integrales, elektrisches Heizelement (116) für hohe Spannung aufweist und die vordere Düse (10) ein integrales elektrisches Niederspannungs-Heizelement (52) aufweist.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT89106618T ATE86540T1 (de) | 1988-04-13 | 1989-04-13 | Spritzgiesssystem mit duese in tandem. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA563982 | 1988-04-13 | ||
CA000563982A CA1266359A (en) | 1988-04-13 | 1988-04-13 | Injection molding system with nozzles in tandem |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0337454A2 EP0337454A2 (de) | 1989-10-18 |
EP0337454A3 EP0337454A3 (en) | 1990-04-25 |
EP0337454B1 true EP0337454B1 (de) | 1993-03-10 |
Family
ID=4137824
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89106618A Expired - Lifetime EP0337454B1 (de) | 1988-04-13 | 1989-04-13 | Spritzgiesssystem mit Düse in Tandem |
Country Status (6)
Country | Link |
---|---|
US (1) | US4818217A (de) |
EP (1) | EP0337454B1 (de) |
AT (1) | ATE86540T1 (de) |
CA (1) | CA1266359A (de) |
DE (1) | DE68905213T2 (de) |
ES (1) | ES2038797T3 (de) |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4005437A1 (de) * | 1990-02-21 | 1991-08-29 | Dangelmaier Sfr Formbau | Beheizte duese, sogenannte langduese fuer ein kunststoff-spritzgiesswerkzeug |
US5539857A (en) * | 1994-01-24 | 1996-07-23 | Caco Pacific Corporation | Heater block for injection molding with removable heat conductive member in groove in heater block |
US5609893A (en) * | 1995-01-12 | 1997-03-11 | Jk Molds, Inc. | Probe assembly for injection molding apparatus |
CA2180603A1 (en) * | 1996-07-05 | 1998-01-06 | Jobst Ulrich Gellert | Injection molding manifolds with melt connector bushing |
US5804228A (en) * | 1996-08-21 | 1998-09-08 | Caco Pacific Corporation | Minimum vestige nozzle assembly for plastics injection molding |
US6099292A (en) * | 1997-10-22 | 2000-08-08 | Caco Pacific Corporation | Heater block with unitized removable heat conductive member |
CA2286953A1 (en) | 1999-10-18 | 2001-04-18 | Helen Zhuang | Injection nozzle system |
US7189071B2 (en) * | 2003-02-12 | 2007-03-13 | Mold-Masters Limited | Telescopic manifold nozzle seal |
US7179081B2 (en) * | 2003-04-07 | 2007-02-20 | Mold-Masters Limited | Front-mountable, edge-gating nozzle |
US7306454B2 (en) * | 2003-04-07 | 2007-12-11 | Mold-Masters Limited | Front-mountable injection molding nozzle |
US7252498B2 (en) * | 2003-04-07 | 2007-08-07 | Mold-Masters Limited | Hot runner nozzle with melt sealing |
US7160100B2 (en) | 2004-01-06 | 2007-01-09 | Mold-Masters Limited | Injection molding apparatus having an elongated nozzle incorporating multiple nozzle bodies in tandem |
CA2482254A1 (en) * | 2004-04-07 | 2005-10-07 | Mold-Masters Limited | Modular injection nozzle having a thermal barrier |
JP2005297566A (ja) * | 2004-04-07 | 2005-10-27 | Mold Masters Ltd | 加熱されるノズル本体セグメント及び加熱されないノズル本体セグメントを有するノズル本体を備えたノズル |
EP1584443A1 (de) * | 2004-04-07 | 2005-10-12 | Mold-Masters Limited | Spritzgiessdüsenkörper mit geheizten und ungeheizten Düsenkörperteilen |
CA2475500A1 (en) * | 2004-04-07 | 2005-10-07 | Jonathon Fischer | Nozzle having a nozzle body with heated and unheated nozzle body segments |
US7614869B2 (en) | 2007-05-08 | 2009-11-10 | Mold-Masters (2007) Limited | Manifold nozzle connection for an injection molding system |
US7845936B2 (en) * | 2009-01-21 | 2010-12-07 | Mold-Masters (2007) Limited | Sealing arrangement for an edge gated nozzle in an injection molding system |
EP2228193B1 (de) * | 2009-03-13 | 2012-08-08 | Hans Schreck | Düsenvorrichtung |
CN108188375B (zh) * | 2018-02-14 | 2024-02-02 | 苏州工业职业技术学院 | 一种双法兰轴流风机机壳压铸模 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3632248A (en) * | 1969-01-15 | 1972-01-04 | Nyles V Reinfeld | Injection press apparatus |
US3677682A (en) * | 1970-03-09 | 1972-07-18 | Ladislao Wladyslaw Putkowski | Hot runner system |
US3843295A (en) * | 1973-05-24 | 1974-10-22 | Bischoff Chemical Corp | Injection molding machine with adjustable nozzle length means |
US4238671A (en) * | 1979-05-08 | 1980-12-09 | Gellert Jobst U | Sprue bushing with cast in heater element |
CA1136815A (en) * | 1980-07-15 | 1982-12-07 | Jobst U. Gellert | Injection molding nozzle seal |
CA1179813A (en) * | 1981-07-15 | 1984-12-27 | Jobst U. Gellert | Sprue bushing connector assembly and method |
CA1213706A (en) * | 1984-02-17 | 1986-11-12 | Gellert, Jobst Ulrich | Injection molding valve gated system |
CA1230458A (en) * | 1984-07-13 | 1987-12-22 | Gellert, Jobst Ulrich | Injection molding heated nozzle with brazed in heating element and method of manufacture |
-
1988
- 1988-04-13 CA CA000563982A patent/CA1266359A/en not_active Expired - Lifetime
- 1988-05-09 US US07/191,882 patent/US4818217A/en not_active Expired - Lifetime
-
1989
- 1989-04-13 EP EP89106618A patent/EP0337454B1/de not_active Expired - Lifetime
- 1989-04-13 ES ES198989106618T patent/ES2038797T3/es not_active Expired - Lifetime
- 1989-04-13 DE DE8989106618T patent/DE68905213T2/de not_active Expired - Fee Related
- 1989-04-13 AT AT89106618T patent/ATE86540T1/de not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE68905213D1 (de) | 1993-04-15 |
ATE86540T1 (de) | 1993-03-15 |
DE68905213T2 (de) | 1993-06-17 |
EP0337454A2 (de) | 1989-10-18 |
CA1266359A (en) | 1990-03-06 |
EP0337454A3 (en) | 1990-04-25 |
ES2038797T3 (es) | 1993-08-01 |
US4818217A (en) | 1989-04-04 |
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